US3872540A - Sweeper pickup head - Google Patents
Sweeper pickup head Download PDFInfo
- Publication number
- US3872540A US3872540A US386313A US38631373A US3872540A US 3872540 A US3872540 A US 3872540A US 386313 A US386313 A US 386313A US 38631373 A US38631373 A US 38631373A US 3872540 A US3872540 A US 3872540A
- Authority
- US
- United States
- Prior art keywords
- chamber
- exhaust line
- pickup head
- air
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/20—Means for cleaning filters
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/24—Floor-sweeping machines, motor-driven
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/14—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum cleaning by blowing-off, also combined with suction cleaning
Definitions
- ABSTRACT A sweeper having an air-assist pickup head in which the exhaust chamber is bounded on three sides by a secondary exhaust chamber.
- a primary exhaust line extends from the primary exhaust chamber to a debris collecting plenum.
- a secondary exhaust line extends from the secondary exhaust chamber and joins the primary exhaust line through a small orifice located just ahead of the debris plenum.
- the secondary exhaust chamber is completely bounded by walls which extend to the surface being cleaned so that the secondary chamber is reasonably well sealed both from the primary exhaust chamber and from the atmosphere.
- the present invention relates to sweepers and pickup heads for sweepers. It is particularly pertinent with respect to sweepers having air-assist pickup heads.
- Air-assist pickup heads deliver air under pressure to an exhaust chamber.
- the air under pressure sweeping over the surface being cleaned tends to loosen debris which is then exhausted through an exhaust line joined to the exhaust chamber.
- a sweeper having a pickup head of this type is disclosed in US. Pat. No. 3,512,206, issuing to Mr. B. W. Young on May 19, 1970, the disclosure of which is hereby incorporated by reference.
- the exahust chamber is enclosed on all sides with the front wall being a flexible flap so that debris and the like can pass thereunder and into the exahust chamber,
- One prior art device provides a pressure chamber within the exahust chamber so that air delivered to the pickup head tends to be guided directly from the air delivery conduit to the exhaust conduit by the walls of the pressure chamber. Some air is allowed to flowout into the exhaust chamber underneath a forward wall of the pressure chamber, the forward wall of the pressure chamber being located generally in the middle of the exhaust chamber. The area of the exhaust chamber both in front of and behind the pressure chamber are also in flow communication with the exhaust line through which air in the pressure chamber is exhausted. The effectiveness of this device for stirring up and picking up dust and debris and the effectiveness of this device for purposes of controlling dust are not known. However, to the extent that a portion of the exhaust chamber is positioned behind the pressure chamher. the effectiveness of the exhaust chamber ahead of the pressure chamber is diluted.
- the relative vacuum within the exhaust chamber will still be substantially diluted by the air introduced under pressure so that air which leaks out of the pressurized chamber when the pickup head passes over diviations will still tend to leak out under the walls of the surrounding exhaust chamber, thereby kicking up dust.
- a secondary exhaust chamber open at the bottom, is positioned adjacent the primary exhaust chamber, and sealing means are provided at the periphery of the secondary chamber for generally sealing the secondary chamber from the primary exhaust chamber and from the atmosphere when the pickup head is in its normal operative position.
- Air delivery means and air exhaust means are provided in flow communication with the primary exhaust chamher.
- a secondary exhaust line is operably joined to the secondary exhaust chamber and to the exhaust means. Becuase the secondary exhaust chamber is generally sealed with respect to the atmosphere and with respect to the primary exhaust chamber, there is normally very little flow of air into the secondary exhaust chamber and through the secondary exhaust line.
- air and dust escaping out of the primary exhaust chamber are generally captured within the secondary exhaust chamber and are exhausted throughthe secondary exhaust line. In this way, the extent to which dust escapes into the atmosphere is substantially minimized.
- Dust escaping with bleed-off air is controlled by connecting a bleed-off line from the air delivery conduit to a filter.
- the bleed-off line extends from the air delivery line just ahead of the juncture of the air delivery line with the pickup head.
- the filter is positioned above the pickup head and a chute connects the filter to the pickup head such that dust collecting in the filter can be shaken down through the chute and into the pickup head for return to the debris plenum chamber of the'sweeper.
- FIG. 1 is a side elevational view of a sweeper made in accordance with the present invention
- FIG. 2 is a top plan view of the pickup head for the sweeper shownin FIG. 1;
- Flg. 3 is a cross-sectional view taken along plane III- III of FIG. 2;
- FIG. 4 is a cross-sectional view taken along IV-IV of FIG. 2;
- FIG. 5 is a fragmentary side elevational view of the sweeper of the present invention.
- FIG. 6 is a fragmentary cross-sectional view taken generally along plane VI--VI of FIG. 5;
- FIG-.7 is an enlarged fragmentary side-elevational view of the sweeper taken on the side opposite the side shown in FIG. 5;
- FIG. 8 is a cross-sectional view of the bleed-off filter.
- the sweeper 1 has a pickup head 2 (FIG. 1) which includes a primary exhaust chamber 10 bounded on three sides by a secondary exhaust chamber (FIGS. 2 and 4).
- An air delivery line delivers air under pressure to an air distribution chamber in the top of pickup head 2.
- Distribution chamber 40 distributes the air generally along the length of pickup head 2 and delivers it into primary exhaust chamber 10 through an air-blast slot 50.
- a primary exhaust line exhausts air from theprimary exhaust chamber 10 and into a debris plenum chamber (FIGS. 2 and 5). Air is both exhausted from pickup head 2 and delivered to pickup head 2 by means of a blower which is not shown.
- a secondary exhaust line extends from secondary exhaust chamber 20 and is joined to primary exhaust line 60 through a small orifice located just ahead of debris plenum chamber 70 (FIGS. 4, 5 and 6).
- the various walls of secondary exhaust chamber 20 e.g. numbers 13, 23 and 25 of FIGS. 3 and 4) extend to the level of the surface being cleaned so that secondary chamber 20 is generally sealed both from primary exhaust chamber and from the atmosphere.
- very little air is exhausted through secondary exhaust line 80 until pickup head 2 passes over deviations in-the surface being cleaned, in which case dust escaping underneath the walls of primary chamber 10 is generally captured within secondary exhaust chamber 20 and is exhausted through secondary exhaust line 80.
- Air is bled off of air delivery 35 through a bleed-off line 100 to a filter 110 (FIGS. 7and 8).
- Filter 110 is positioned above pickup head 2 and is joined to the primary exhaust chamber 10 by means of a chute 120. Dust collecting in the filter element 112 of filter 110 can be shaken downwardly through chute 120 into primary exhaust chamber 10 of pickup head 2.
- the secondary exhaust chamber is divided into three parts, a rear compartment 21 and a pair of spaced side compartments 24 (FIGS. 2, 3 and 4).
- Rear compartment 21 is bounded at the front by rear flap 13 of primary exhaust chamber 10.
- Rear compartment 21 is bounded at its rear by a downwardly projecting flexible rear flap 23. Both of these flaps are sufficiently long that they normally engage the surface being cleaned when pickup head 2 is in its operative position. Because of their flexibility, these flaps also tend to continuously engage the surface even as one passes over irregularities.
- the top of rear compartment 21 is closed by top wall 22.
- Each end of rear compartment 21 is closed by a portion of side wall 11 which projects beyond rear flap 13 and terminates and by the inside wall a of side compartments 24.
- Rear flap 13 and rear flap 23 extend continuously between these end defining walls.
- the side compartments 24 are in flow communication with rear compartment 21 through a rectangular shaped communicating aperture in each inside end wall 25a.
- Each side compartment 24 is defined by a pair of spaced side walls, inside wall 25a and outside wall 25, joined together by means of a generally U- shaped spacer 26.
- U-shaped spacer 26 includes a top wall 27 and a downwardly depending end wall 28 at each end thereof, the end walls 28 extending to the same level as do the side walls 25 and 25a.
- Suitable bolts 29 or the like extend through the side walls 25 and 25a and spacer 26 to thereby hold the entire assembly together.
- the side walls 25 and 250 are made of a sturdy material such as wood since they serve not only to bound side compartments 24, but also serve as shoes upon which the pickup head 2 rides on the surface which is being cleaned.
- each side compartment 24 is provided with a plurality of vertically spaced adjustment holes 31 whereby each side compartment 24 is joined to a side wall 11 of pickup head 2 (FIG. 3).
- a pair of spaced bolts 32 pass through the holes 31 on one level and are threadedly received into a clamping bar 33.
- the side walls 25 and 25a wear out through continued engagement with the surface being cleaned, one can relocate the side compartments 24 downwardly by passing bolts 32 through a higher set of holes 31.
- Primary exhaust line 60 includes a conduit 61 of approximately 6 inches in diameter joined by a suitable connector sleeve to one end ofpickup head 2 (FIG. 5). Exhaust line 60 is located at the end opposite end delivery line 35 so that air tends to sweep into one end of primary exhaust chamber and across primary exhaust chamber 10 into primary exhaust line 60. Conduit 61 is connected at its other end to the upper portion 62 of exhaust line 60 by suitable connector sleeve. The upper portion 62 of exhaust line 60 is actually defined by sheet metal partitions. The upper portion 62 opens into the debris plenum chamber 70. A viewing port 65 can be opened to inspect primary exhaust line 60, particularly for purposes of making sure that orifice 90 has not been clogged.
- Secondary exhaust line 80 comprises a flexible conduit joined at one end by means of a suitable connector sleeve to generally the center of the rear compartment 21 of secondary exhaust chamber (FIG. 5). At its upper end, the conduit is joined to a metal connector sleeve 82 which in turn is fastened onto the upper portion 62 of primary exhaust line 60.
- Secondary exhaust line .80 is preferably a conduit of approximately 3 inches in diameter. This allows air to move readily through secondary exhaust line 80. Yet, orifice 90 is preferably only about one-third the diameter of secondary exhaust line 80, or approximately 1 inch in diameter.
- bleed-off line 100 is joined to the bottom of filter 110 (FIGS. 7 and 8).
- Bleed-off line 100 constitutes a flexible conduit of approximately 2 inches in diameter. It is joined to connector sleeve 101 on air delivery line 35 and to a suitable connector sleeve at the bottom of filter 110.
- Housing 111 has a sloped bottom floor 116 such that dust which is shaken out of filter element 112 tends to fall down the sloped floor 116 and into chute 120 which joins housing 110 at the bottom of sloped floor 116.
- the side walls of housing 111 include vent apertures 115 such that air tends to flow into housing 110 and upwardly through the sleeves 113 of filter element 112 and out through vent apertures 115.
- Chute 120 is a flexible conduit which extends downwardly from the bottom of housing ll0 and which is joined to a connector sleeve 123 in top wall 14 of primary exhaust chamber 10 (FIGS. 2, 4 and 7).
- the operator occasionally shakes filter element 112 by grasping handle 117 and shaking it up and down. This causes collected dust to fall downwardly through chute 120 into primary exhaust chamber 10 where it is exhausted'through primary exhaust line 60 back into debris collecting plenum chamber 70.
- pickup head 2 is lowered until the walls 25 and 25a engage the surface to be cleaned.
- the blower is activated and sweeper 1 is driven over the surface to be cleaned.
- Air is blasted into primary exhaust chamber 10 through air-blast slot 50. This loosens dust and debris to be cleaned and sweeps them down toward the end of primary exhaust chamber 10 adjacent.
- primary exhaust line 60 Dust and debris are exhausted upwardly through primary exhaust line 60 into debris collecting plenum chamber 70. Dust and debris tend to settle out of the air and debris plenum chamber and the air is then blown back through air delivery line 35 into air distribution chamber 40 and back through air blast slot 50.
- Dust control of bleed-off air is affected in that the bleed-off air passes through bleed-off line into filter 110.
- the operator occasionally shakes it by grasping handle 117 and moving it up and down. This shakes the dust loose and cuases it to fall downwardly onto sloped bottom floor 116 and into chute 120. The dust travels through chute 120 downwardly into primary exhaust chamber 10 where it is again exhausted through primary exhaust line 60.
- a surface cleaning apparatus including a pickup head, said apparatus comprising: said pickup head having a first chamber and a second chamber, said second chamber being adjacent said first chamber; said first chamber being open at. the bottom; air delivery means in flow communication with said first chamber of said first and second chambers only; air exhaust means in flow communication with saidfirst chamber; said second chamber being open at the bottom and including sealing means at the periphery of said second chamber for generally sealing said second chamber from said first chamber and from the atmosphere when said pickup head is in an operative position whereby the flow of air through said second chamber is normally minimal; a secondary exhaust line operably joining said second chamber to said exhaust means at a point substantially downstream from said first chamber whereby when said pickup head passes over a deviation in the surface being cleaned, air and dust escaping out of said first chamber are generally captured in said second chamber and exhausted through said secondary exhaust line.
- said exhaust means including a primary exhaust line in flow communication with a blower; said secondary exhaust line being operably connected to said primary exhaust line at a point substantially downstream from the juncture of said primary exhaust line with said first chamber.
- the apparatus of claim 2 comprising: a plenum chamber for collecting debris; said primary exhaust line exhausting into said plenum chamber; said secondary exhaust line being joined to said primary exhaust line just ahead of said plenum chamber.
- the apparatus of claim 3 comprising: said secondary exhaust line being of a sufficiently large diameter that air flows relatively easily theretrhough; said secondary exhaust line being joined to said primary exhaust line through an orifice, said orifice being of a smaller diameter than the diameter of said secondary exhaust line whereby dilution of the exhausting force through said primary exhaust line is minimized and wherebyjust enough exhausting force is maintained in said second chamber to effect dust control when said pickup head passes over deviations in the surface being cleaned.
- said second chamber includes a rear portion at the rear of said first chamber and a side portion at each of the sides of said first chamber; said secondary exhaust line being joined to said second chamber generally at the center of the rear portion of said second chamber.
- said side portions of said second chamber comprise a pair of plates joined to the opposite sides of a generally U-shaped spacer, one of said plates including an aperture therein whereby said side portions of said second chamber communicate with said rear portion thereof.
- said air delivery means includes a slot in said first chamber through which air is delivered, said slot being positioned immediately adjacent said rear portion of said second chamber.
- the apparatus of claim 2 comprising: said secondary exhaust line being of a sufficiently large diameter that air flows relatively easily therethrough; said secondary exhaust line being joined to said primary exhaust line through an orifice, said orifice being of a smaller diameter than the diameter of said secondary exhaust line whereby dilution of the exhausting force through said primary exhaust line is minimized and whereby just enough exhausting force maintained in said second chamber to effect dust control when said pickup head passes over deviations in the surface being cleaned.
- said air delivery means includes an air delivery line connected with said pickup head; a bleed-off line joined to said air delivery line for bleeding of a portion of the air passing through said air delivery line beofre it reaches said pickup head; a filter on said bleed-off line, said filter being positioned above said pickup head; a chute joining said filter with said pickup head whereby dust collected in said filter can fall down through said chute into said pickup head.
- said air delivery means includes an aperture in said first chamber through which air is delivered, said aperture being positioned immediately adjacent said second chamber.
- a surface cleaning apparatus including a pickup head, said surface cleaning apparatus comprising: said pickup head including first and second chambers; said first chamber having peripheral wall means generally enclosing said first chamber,.said first chamber being open at the bottom; air delivery means in flow communication with said first chamber of said first and second chambers only for delivering air under pressure into said first chamber; exhaust means in flow communication with said first chamber for exhausting air, duct and the like therefrom; said second chamber being adjacent said first chamber; said second chamber being open at the bottom and having peripheral wall means extending around the entire periphery thereof and extending downwardly generally to the surface being cleaned when said pickup head is in an operative position for generally sealing said second chamber from said first chamber and from the atmosphere whereby the flow of air through said second chamber is normally minimal; a secondary exhaust line operably connecting said second chamber with said exhaust means at a point substantially downstream from said first chamber whereby when said pickup head passes over a deviation in the surface being cleaned, air and dust escaping out of said first chamber are generally captured in second chamber and exhausted through said secondary exhaust line.
- the apparatus of claim 21 including: said exhaust means including a primary exhaust line in flow communication with a blower; said secondary exhaust line being operably connected to said primary exhaust line at a point substantially downstream from the juncture of said primary exhaust line with said first chamber.
- the apparatus of claim 22 comprising: a plenum chamber for collecting debris; said primary exhaust line exhausting into said plenum chamber; said secondary exhaust line being joined to said primary exhaust line just ahead of said plenum chamber.
- the apparatus of claim 23 comprising: said secondary exhaust line being of a sufficiently large diameter that air flows relatively easily therethrough; said secondary exhaust line being joined to said primary exhaust line through an orifice, said orifice being of a smaller diameter than the diameter of said secondary exhaust line whereby dilution of the exhausting force through said primary exhaust line is minimized and whereby just enough exhausting force is maintained in said second chamber to effect dust control when said pickup head passes over deviations in the surface being cleaned.
- said air delivery means includes an air delivery line connected with said pickup head; a bleed-off line joined to said air delivery line for bleeding off a portion of the air passing through said air delivery line before it reaches said pickup head; a filter on said bleed-off line, said filter being positioned above said pickup head; a chute joining said filter with said pickup head whereby dust collected in said filter can fall down through said chute into said pickup head.
- said air delivery means includes an aperture in said first chamber through which air is delivered, said aperture being positioned immediately adjacent said second chamber.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
Description
Claims (30)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US386313A US3872540A (en) | 1973-08-07 | 1973-08-07 | Sweeper pickup head |
CA203,803A CA1011508A (en) | 1973-08-07 | 1974-07-02 | Sweeper with an air assist pick up head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US386313A US3872540A (en) | 1973-08-07 | 1973-08-07 | Sweeper pickup head |
Publications (1)
Publication Number | Publication Date |
---|---|
US3872540A true US3872540A (en) | 1975-03-25 |
Family
ID=23525077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US386313A Expired - Lifetime US3872540A (en) | 1973-08-07 | 1973-08-07 | Sweeper pickup head |
Country Status (2)
Country | Link |
---|---|
US (1) | US3872540A (en) |
CA (1) | CA1011508A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006511A (en) * | 1976-01-08 | 1977-02-08 | Fmc Corporation | Sweeper with recirculation hood and independent filter system |
FR2337791A1 (en) * | 1976-01-08 | 1977-08-05 | Fmc Corp | STREET SWEEPER WITH MANIFOLD WITH PNEUMATIC LOCK |
FR2340412A1 (en) * | 1976-02-05 | 1977-09-02 | Fmc Corp | CONTINUOUS ONE-WAY CONTINUOUS CIRCULATION COLLECTOR CASING FOR STREET SWEEPERS |
DE3805162A1 (en) * | 1987-02-27 | 1988-09-08 | Tymco Inc | QUICK RECEIVING HEAD |
US6108859A (en) * | 1998-07-29 | 2000-08-29 | Alto U. S. Inc. | High efficiency squeegee |
US20050115015A1 (en) * | 2003-03-07 | 2005-06-02 | Legatt Donald J. | Squeegee assembly |
US20060213025A1 (en) * | 2005-03-25 | 2006-09-28 | Sawalski Michael M | Soft-surface remediation device and method of using same |
US20060288516A1 (en) * | 2005-06-23 | 2006-12-28 | Sawalski Michael M | Handheld mechanical soft-surface remediation (SSR) device and method of using same |
US20060288495A1 (en) * | 2005-06-28 | 2006-12-28 | Sawalski Michael M | System for and method of soft surface remediation |
US20080083429A1 (en) * | 2006-10-06 | 2008-04-10 | Mark Schwarze | Cartridge flap for mechanized sweeper |
US20080083431A1 (en) * | 2006-10-06 | 2008-04-10 | Mark Schwarze | Device and method for clearing debris from the front of a hood in a mechanized sweepers |
US20080083084A1 (en) * | 2006-10-06 | 2008-04-10 | Mark Schwarze | Modular hood for mechanized sweeper |
US9725859B1 (en) * | 2016-02-22 | 2017-08-08 | Armando Hernandez | Pick-up head for street sweeping and cleaning vehicles |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2790509A (en) * | 1954-11-18 | 1957-04-30 | Share Barnett | Dust collector |
US3304572A (en) * | 1965-01-06 | 1967-02-21 | Tennant Co G H | Divided dust collector housing |
US3484889A (en) * | 1967-09-25 | 1969-12-23 | Scott & Fetzer Co | Sweeper filter |
US3639940A (en) * | 1969-08-22 | 1972-02-08 | Tennant Co | Filter chamber |
US3755851A (en) * | 1971-10-28 | 1973-09-04 | Central Texas Iron Works Inc | Gas cleaning apparatus |
-
1973
- 1973-08-07 US US386313A patent/US3872540A/en not_active Expired - Lifetime
-
1974
- 1974-07-02 CA CA203,803A patent/CA1011508A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2790509A (en) * | 1954-11-18 | 1957-04-30 | Share Barnett | Dust collector |
US3304572A (en) * | 1965-01-06 | 1967-02-21 | Tennant Co G H | Divided dust collector housing |
US3484889A (en) * | 1967-09-25 | 1969-12-23 | Scott & Fetzer Co | Sweeper filter |
US3639940A (en) * | 1969-08-22 | 1972-02-08 | Tennant Co | Filter chamber |
US3755851A (en) * | 1971-10-28 | 1973-09-04 | Central Texas Iron Works Inc | Gas cleaning apparatus |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006511A (en) * | 1976-01-08 | 1977-02-08 | Fmc Corporation | Sweeper with recirculation hood and independent filter system |
FR2337791A1 (en) * | 1976-01-08 | 1977-08-05 | Fmc Corp | STREET SWEEPER WITH MANIFOLD WITH PNEUMATIC LOCK |
US4044422A (en) * | 1976-01-08 | 1977-08-30 | Fmc Corporation | Sweeper pickup hood with air lock |
FR2340412A1 (en) * | 1976-02-05 | 1977-09-02 | Fmc Corp | CONTINUOUS ONE-WAY CONTINUOUS CIRCULATION COLLECTOR CASING FOR STREET SWEEPERS |
DE3805162A1 (en) * | 1987-02-27 | 1988-09-08 | Tymco Inc | QUICK RECEIVING HEAD |
DE3805162C2 (en) * | 1987-02-27 | 2000-10-05 | Tymco Inc | Suction cleaner |
US6108859A (en) * | 1998-07-29 | 2000-08-29 | Alto U. S. Inc. | High efficiency squeegee |
US20060143855A9 (en) * | 2003-03-07 | 2006-07-06 | Legatt Donald J | Squeegee assembly |
US20050115015A1 (en) * | 2003-03-07 | 2005-06-02 | Legatt Donald J. | Squeegee assembly |
US7254867B2 (en) | 2003-03-07 | 2007-08-14 | Nilfisk-Advance, Inc. | Squeegee assembly |
US20060213025A1 (en) * | 2005-03-25 | 2006-09-28 | Sawalski Michael M | Soft-surface remediation device and method of using same |
US7757340B2 (en) | 2005-03-25 | 2010-07-20 | S.C. Johnson & Son, Inc. | Soft-surface remediation device and method of using same |
US20060288516A1 (en) * | 2005-06-23 | 2006-12-28 | Sawalski Michael M | Handheld mechanical soft-surface remediation (SSR) device and method of using same |
US20060288495A1 (en) * | 2005-06-28 | 2006-12-28 | Sawalski Michael M | System for and method of soft surface remediation |
US20080083429A1 (en) * | 2006-10-06 | 2008-04-10 | Mark Schwarze | Cartridge flap for mechanized sweeper |
US20080083431A1 (en) * | 2006-10-06 | 2008-04-10 | Mark Schwarze | Device and method for clearing debris from the front of a hood in a mechanized sweepers |
US20080083084A1 (en) * | 2006-10-06 | 2008-04-10 | Mark Schwarze | Modular hood for mechanized sweeper |
US9725859B1 (en) * | 2016-02-22 | 2017-08-08 | Armando Hernandez | Pick-up head for street sweeping and cleaning vehicles |
Also Published As
Publication number | Publication date |
---|---|
CA1011508A (en) | 1977-06-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: COOPER INDUSTRIES, INC., 1001 FANNIN, HOUSTON, TEX Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MCGRAW-EDISON COMPANY;REEL/FRAME:004475/0965 Effective date: 19851104 |
|
AS | Assignment |
Owner name: COOPER INDUSTRIES, INC., 1001 FANNIN, SUITE 4000, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:COOPER INDUSTRIES, INC., A OH. CORP.;REEL/FRAME:004657/0666 Effective date: 19870108 Owner name: COOPER INDUSTRIES, INC., A CORP. OF DE.,TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COOPER INDUSTRIES, INC., A OH. CORP.;REEL/FRAME:004657/0666 Effective date: 19870108 |
|
AS | Assignment |
Owner name: WELLS FARGO BANK, N.A. Free format text: SECURITY INTEREST;ASSIGNOR:CLARKE INDUSTRIES, INC.;REEL/FRAME:005271/0420 Effective date: 19890412 |